feat(core): respect decoratorVersion config

[Brooooooklyn]

• Close Fix support for 2022-03 decorators #939

[MuTsunTsai]

No, this doesn't really close #939 nor #773, for a few reasons:

1. It assigns parser.decorators to Boolean(opts.experimentalDecorators), which is wrong. It should be true always. Doing it the other way will make decorators available only for the legacy experimental decorators.
2. It assings transform.decoratorVersion to opts.decoratorVersion, but the latter was never assigned in tsCompilerOptionsToSwcConfig so the whole thing just doesn't work.